Graft Copolymerization of Acrylonitrile onto Sodium Salt of Partially Carboxymethylated Tamarind Kernel Powder Using Ceric Ammonium Nitrate as a Photo‐Initiator in an Aqueous Medium Under Ultraviolet‐Radiation

2021 ◽  
Vol 398 (1) ◽  
pp. 2000227
Author(s):  
Jignesh H. Trivedi ◽  
Harshil A. Joshi ◽  
Harikrishna C. Trivedi
Keyword(s):  
Ultraviolet Radiation ◽  
Ammonium Nitrate ◽  
Aqueous Medium ◽  
Sodium Salt ◽  
Graft Copolymerization ◽  
Ceric Ammonium Nitrate ◽  
Tamarind Kernel

scholarly journals Synthesis and Characterization of Poly(methyl acrylate)-grafted-Sodium Salt of Partially Carboxymethylated Tamarind Kernel Powder

2022 ◽  
Vol 34 (2) ◽  
pp. 263-271
Author(s):  
J.H. Trivedi ◽  
J.R. Jivani ◽  
K.H. Patel ◽  
H.C. Trivedi
Keyword(s):  
Sodium Salt ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Reaction Medium ◽  
Ceric Ammonium Nitrate ◽  
Solution Polymerization ◽  
Reaction Conditions ◽  
Tamarind Kernel

Ceric ammonium nitrate (CAN)-initiated graft copolymerization of methyl acrylate (MA) onto sodium salt of partially carboxymethylated tamarind kernel powder (Na-PCMTKP, DS = 0.15) was studied in an aqueous medium by solution polymerization technique. The growth of the graft reaction was monitored gravimetrically. The role of various synthesis variables on the grafting yields was examined to achieve the maximum graft yields (%G = 278.27, %GE = 94.38, %Hp = 5.62) and the influence of the synthesis variables in the graft copolymerization has been discussed. The reactivity of methyl acrylate (MA) towards graft copolymerization was compared with that of acrylonitrile (AN) on the basis of the results obtained from the earlier studies and plausible explanation was furnished for the observed reactivity of both the monomers towards grafting. The evaluated optimized reaction conditions were utilized to study the effect of reaction medium on grafting and it was found that reaction medium plays an important role in graft copolymerization. In order to ascertain the grafting, characterization of the samples made by FTIR, TGA and SEM was conducted. The synthesized novel graft copolymer may find potential application to be used as metal adsorbents.

Modification of Sodium Salt of Partially Carboxymethylated Guar Gum by Graft Copolymerization with Methyl Acrylate

2005 ◽  
Vol 13 (3) ◽  
pp. 301-312
Author(s):  
Jignesh H. Trivedi ◽  
Natu K. Patel ◽  
Harikrishna C. Trivedi ◽  
Kiran Kalia
Keyword(s):  
Sodium Salt ◽  
Methyl Acrylate ◽  
Guar Gum ◽  
Graft Copolymerization ◽  
Kinetic Scheme ◽  
Ceric Ammonium Nitrate ◽  
Electron Microscopic ◽  
Reaction Conditions ◽  
Redox Initiator ◽  
Ir Spectroscopic

Grafting of methyl acrylate onto sodium salt of partially carboxymethylated guar gum (backbone) was carried out using ceric ammonium nitrate as a redox initiator in an aqueous medium. The reaction variables including concentrations of initiator, nitric acid, monomer and amount of the backbone as well as time and temperature were varied for establishing the optimized reaction conditions for grafting. The influence of these reaction parameters on the grafting yields and the rates of polymerization, graft copolymerization and homopolymerization was also studied and the results were discussed. The kinetic scheme of free radical graft copolymerization was proposed and the experimental results were found to agree very well with the proposed kinetic scheme. The graft copolymer sample was characterized by IR-spectroscopic, thermal and scanning electron microscopic techniques.

Ceric-induced grafting of acrylonitrile onto sodium alginate: kinetics and mechanism and effects of the reaction medium

1994 ◽  
Vol 6 (3) ◽  
pp. 193-200 ◽  
Author(s):  
S B Shah ◽  
C P Patel ◽  
H C Trivedi
Keyword(s):  
Free Radical ◽  
Ammonium Nitrate ◽  
Sodium Alginate ◽  
Graft Copolymerization ◽  
Mixed Solvents ◽  
Reaction Medium ◽  
Kinetic Scheme ◽  
Water Systems ◽  
Ceric Ammonium Nitrate ◽  
Good Agreement

The kinetic scheme of free radical graft copolymerization of acrylonitrile (AN) onto sodium alginate, using ceric ammonium nitrate as an initiator, has been proposed and equations relating the values of Rp, Rr and Rh are also suggested. The results have been found to be in good agreement with the proposed mechanism. The per cent grafting of AN onto sodium alginate has also been determined as a function of composition of the mixed solvents comprising methanol: water, ethanol: water, n-propanol:water and n-butanol: water systems. The reaction medium has been found to play an important role in graft copolymerization. The results of the effect of the reaction medium on grafting are also discussed.

Graft copolymerization of methyl methacrylate onto sago starch using ceric ammonium nitrate and potassium persulfate as redox initiator systems

2002 ◽  
Vol 83 (10) ◽  
pp. 2275-2275
Author(s):  
Isam Y. M. Qudsieh ◽  
Wan Md Zin Wan Yunus ◽  
Fakhru'l-Razi A. ◽  
Mansor B. Ahmad ◽  
Mohamad Zaki Ab. Rahman
Keyword(s):  
Methyl Methacrylate ◽  
Ammonium Nitrate ◽  
Graft Copolymerization ◽  
Potassium Persulfate ◽  
Ceric Ammonium Nitrate ◽  
Sago Starch ◽  
Redox Initiator
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